/*   
  -- The Lime II Project -- 

  A tuplespaces-based middleware for coordinating agents and mobile hosts.
  Copyright (C) 2005.
  Gian Pietro Picco, Amy L. Murphy, Lorenzo Bellini.

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received this copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
*/

package lime2;

/**
 * The listener within a local system reaction installed because of the installation of a "remote or unspecified case"
 * weak reaction.
 * 
 * @author Gian Pietro Picco
 * @author Amy Murphy
 * @author Lorenzo Bellini
 */

class SystemRemoteWeakL extends SystemListener
{
 // private data members	
 private ReactionListener rl;
 private boolean unspecified;
 private byte mode;
 private ReactionID id;
 private LimeTSMgr ltsm;	
  
 /**
  * Constructor method.
  * 
  * @param r original reaction  
  * @param id reaction identifier
  * @param ltsm LimeTSMgr of the tuplespace 
  */
 SystemRemoteWeakL(Reaction r, ReactionID id, LimeTSMgr ltsm)
 {
  this.rl = r.getListener();
  this.unspecified = Location.UNSPECIFIED.equals(LimeWrapper.getCur(r.getTemplate()));
  this.mode = r.getMode();
  this.id = id;
  this.ltsm = ltsm;
 }
 
 /**
  * This method is invoked automatically by the Lime system when the corresponding reaction must fire. 
  * 
  * @param re ReactionEvent
  */ 
 public void reactsToOut(ReactionEvent re)
 {
  // if the reaction is not for the federated tuplespace we don't have the local strong / remote weaks
  // if the reaction is not a once reaction we don't have to uninstall the local strong / remote weaks
  if (unspecified && mode == Reaction.ONCE) 
  {
   ReactionID[] ids = new ReactionID[] {id};	
   // .. maybe the strong posted the WeakOp and so it is already deregistered
   ltsm.deregisterStrong(ids); 
   
   // please note that we use priority of events
   ReactionOp tmp = new ReactionOp(LimeConstants.REMOVE_WEAK, ids, new Result());
   CommunicationMgr.get().postEvent(new RemReactionOp(LimeConstants.REM_REMOVE_MULTI, LimeConstants.OPEN, ltsm.getName(), tmp));
  }
   
  rl.reactsToOut(re);
 }
	
}
